]]>
A new heteromorph ammonite genus, Tarrantites, is proposed for Hamites adkinsi Scott, 1928. The description of the new genus is based mainly on a near-complete specimen from the Middle Albian part of the Goodland Limestone of Tarrant County, Texas, the holotype, and on an abraded mould on a pebble from the bed of a stream in Hill County, Texas. In addition, we record the presence of the genus in the Albian of Pakistan. Tarrantites shows a remarkable resemblance to the labeceratine genera Labeceras Spath, 1925 and Myloceras Spath, 1925: in coiling and size to the former, and in ornamentation to the latter, but is excluded from the subfamily Labeceratinae Spath, 1925, because it has a distinct bifid adventive (A) lobe. This latter feature, and the ornamentation, rather suggest affinities of Tarrantites with the family Anisoceratidae Hyatt, 1900.

We thank Arthur Busbey at the Department of Geology at Texas Christian University for loan of the specimens TCU1046 and TCU1144. We also thank Ann Molineux at the Texas Natural Science Center at the University of Texas at Austin for loan of the specimen NPL19654. Klinger thanks the National Research Foundation, South Africa, for financial assistance. Kennedy acknowledges the technical support of the staff of the Department of Earth Sciences, Oxford and the Oxford University Museum of Natural History.

SPATH, L.F. 1925. On Upper Albian Ammonoidea from Portuguese East Africa. With an appendix on Upper Cretaceous Ammonites from Maputoland. Annals of the Transvaal Museum11:179-200. [ Links ]

SPATH, L.F. 1930. The fossil fauna of the Samana Range and some neighbouring areas, part V. The Lower Cretaceous Ammonoidea; with notes on Albian Cephalopoda from Hazara. Memoirs of the Geological Survey of India, Palaeontologia Indica, new series, 15: 51-66. [ Links ]

SPATH, L.F. 1939. A monograph of the Ammonoidea of the Gault. Part 13. Palaeontographical Society Monograph93: 541-608. [ Links ]

SPATH, L.F., 1941. A monograph of the Ammonoidea of the Gault. Part 14. Palaeontographical Society Monograph95: 609-668. [ Links ]